XDOJ_1090_树状DP

Posted 2020-08-15

http://acm.xidian.edu.cn/problem.php?id=1090

 

水。

 

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<vector>
using namespace std;

struct line
{
    int next,w;
}l;
vector<line> v[10005];
int n;

int dfs(int x)
{
    int sum = 0;
    for(int i = 0;i < v[x].size();i++)    sum = max(sum,dfs(v[x][i].next)+v[x][i].w);
    return sum;
}

int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d",&n);
        for(int i = 1;i <= 10000;i++)    v[i].clear();
        for(int i = 1;i <= n;i++)
        {
            int u;
            scanf("%d%d%d",&u,&l.next,&l.w);
            v[u].push_back(l);
        }
        printf("%d\n",dfs(1));
    }
    return 0;
}